Lightning LabsPalo Alto, CADesigns and implements core Lightning Network protocols and algorithms for Bitcoin's layer-2 scaling. Contributes to Go-based peer-to-peer cryptocurrency daemons, conducts research, and engages with open source community. Requires strong systems engineering with distributed systems and crypto expertise.
Backend Engineer building and optimizing core document workflows (viewing, editing, embeds, exports) and greenfield projects in a Django monolith. Requires 3+ years backend experience, strong Python skills, performance optimization, and automated testing.
Build and operate the enterprise control plane for OpenAI's Codex AI software engineer, focusing on security, governance, identity, access controls, encryption, and policy enforcement systems for large organizations.
Software Engineer III designing, building, and maintaining scalable backend systems with Java, Node.js/NestJS, Kafka, and cloud technologies (AWS/GCP). Requires Master's in CS + 2 years (or Bachelor's + 4 years) backend experience, microservices, databases, and REST APIs.
Software Engineer building scalable backend systems, services, and APIs for Upstart Bank, a modern AI-enabled national bank. Translate regulatory and business requirements into reliable software in a fintech environment; 4+ years backend/full-stack experience required.
Build and scale the control plane for Cloudflare Workers, the serverless edge platform. Design distributed systems, high-traffic APIs, storage schemas, and own production reliability for services powering Pages and R2. Requires strong Go experience plus knowledge of observability, databases, and Kubernetes.